Driving connection with focusing mechanism



Sept. 22, 1942.

E. R. GREER ET AL 2,296, 8 7

DRIVING CONNECTION WITH FOCUSING MECHANISM Original Filed Dec. 13, 1959 6 sheets-sheet l Even/ions 7 Sept- 1942- E. R. GREER ETAL DRIVING CONNECTION WITH FOCUSING MECHANISM Original Filed Dec. 13, 1939 6 S eets-Sheet 2 Invenions AZZorrwys Sept. 22, 1942- E. R. GREER ET AL.

DRIVING CONNECTION WITH FOGUSING MECHANISM 6 Sheets-Sheet 3 Original Filed Dec. 13, 1939 p 1942- E. R. GREER ETAL 2,296,518

DRIVING CONNECTION WITH FOCUSING MECHANISM 6 Sheets-Sheet 4 Original Filed Dec. 13, 1939 I fnven/ions fi mwj zm j maafimm AZ Zorn/4 .5

Sept. 1942" E. R. GREER EIAL.

DRIVING CONNECTION WITH FOCUSING MECHANISM original Filed Dec. 13, 19:59 6 Sheets-Sheet s Afiorneg I jiveniors p 2, 1942- E. R. GREER ETAL. ,296,518

" DRIVING CONNECTION WITH FOCUSING MECHANISM I Original Filed Dec. 13, 1959 6 tsheet 6 Aiiorneys Patented Sept. 22, 1942 UNITED STATES PATENT OFFICE DRIVING CONNECTION WITH FOCUSING MECHANISM Original application December 13, 1939, Serial No. 308,975. Divided and this application tober 19, 1940, Serial No. 361,922

9 Claims. (C1. 74385) This application is a divisional application of our pending application, Serial No. 308,976, filed December 13, 1939, entitled Snow plow with power discharge, now Patent 2,241,252 in which certain improvements in snow plow construction as well as important improvements in flexible or semi-universal driving connections with focusing mechanism were disclosed in conjunction with a snow plow, although broadly claimed and described for use in any machinery or device where a source of rotary power is available in combination with a member mounted at some distance from said source for wide adjustment of its position and having an element thereon which must be driven in the many adjusted positions of the member.

It is an object of this invention to provide comparatively simple and highly efiicient semi-universal driving connections with focusing mechanism associated therewith for driving a rotary element in widely adjusted positions relative to a source of power and for properly and automatically aligning the several driving connections in all adjusted positions for most eflicient driving.

A further object is the provision of driving connections of the class described wherein an extremely wide adjustment of the member carrying the driven member for elevation and angulation in vertical and horizontal planes can be attained with efiicient driving in all adjusted positions and wherein the source of power, driving connections and driven member are subjected to minimum strains. It is to be understood that our invention is adapted for universal application for driving connections between a source of power and a driven member mounted on a widely adjustable element, although in this application an embodiment of the invention is illustrated and described as applied to a wing type snow plow having a rotary discharge element at the outer end thereof.

The foregoing and other objects and advantages of the invention will more fully appear from the following description made in connection with the accompanying drawings, 'wherein like reference characters refer to the same parts throughout the various views, and in which:

Fig. 1 is a front perspective view showing an embodiment of our invention applied to an improved plow operatively attached to the side of a propelling vehicle, and positioned for leveling or widening work;

Fig. 2 is a rear perspective view of the same, the dotted lines indicating the raised or inoperative position of the plow;

Fig. 3 is a perspective view similar to Fig. 2, with the plow adjusted to a substantially elevated position for cutting a rather high bank;

Fig. 4 is a similar perspective view showing the plow adjusted for back sloping with its rear end considerably elevated;

Fig. 5 is a rear elevation of the mold board and cutting edge of the plow, with the discharge rotor detached;

Fig. 6 is a view mostly in rear elevation with the plow and thrust beams shown in section and illustrating the hoist for the rear end of the plow, as well as the connection of the plow at its intermediate portion with the propelling vehicle;

Fig. '7 is a detail view partly in front elevation and partly in section, showing the connection of the mold board at its forward end with the propelling vehicle and the mountings permitting the Various adjustments thereof;

Fig. 8 is a section taken on the line 8-4! of Fig. 7, showing the front slide and pivotal mounting for the mold board;

Fig. 9 is a view partly in top plan and partly in horizontal section, showing the driving connections between the source of power and the discharge rotor and its associated mechanisms;

Fig. 10 is a top plan view showing the driving connections for the rotor and the thrust rod connections between the plow and vehicle when the plow is positioned as shown in Fig. 2, and

Fig. 11 is a similar View with the plow in the position of adjustment shown in Fig. 4.

The embodiment of our invention illustrated provides driving connections between a power take-off at the right-hand side of a heavy truck and a. discharge rotor mounted at the outer end of a wing plow.

Our plow comprises an elongated mold board, designated as an entirety by the numeral [5, and having a sharpened cutting edge [6, detachably secured to the lower edge thereof. The mold board I5 is supported from the propelling vehicle and is mounted for substantially vertical elevation at its forward end, and for pivoting of the mold board at its forward end on a substantially horizontal pivot, as well as for swinging of the mold board through a hoist connected with the rear end thereof. In the various operative positions of the plow, the mold board is extended outwardly at an acute angle from front to rear of the center line of the propelling vehicle, and provision is made for varying this angulation through adjustable thrust connections between the vehicle and the intermediate portion of the mold board.

.funnel portion I 501..

an upwardly lifting action on the material at its rear portion, lifting the material into a flaring or funnel-shaped construction I5a in which a high speed discharge rotor I1 is mounted. To this end the lower edge of the mold board at its forward end is positioned in slight inclination to the vertical, as is the case of the cutting edge IE. Both the cutting edge and the lower edge of the mold board vary length, the rear portions thereof being inclined only slightly to the horizontal to produce the lifting action for effectively feeding material into the funnel portion I 5a and into the axial portion of the rotor. The axis of the rotor extends substantially longitudinally of the main and forward'portion of the mold board, although it passes through the rear peripheral wall of the The variable pitch in the lower edge of the mold board and in the cutting edge It may be observed from aninspection of Fig. 5.

The mold board has at its forward end a rigid attachment tongue I5b in substantially vertical position, which is connected for swinging upon a heavy, substantially horizontal pivot I8, said pivot being carried by a swingable, horizontally disposed bracket I9 (see Fig. 8) which is swingably connected at its inner end with a vertical in pitch throughout their pivot bolt 20, pivot bolt 20 being mounted on outwardly projecting arms 2Ia of avertical slide .member 2| mounted in a substantially vertical guide or mast 22. the forward end of the mold board, is supported Slide member 2|, and with it and its adjustment controlled by means of a suitable Windlass, not shown, connected with the pivot bolt 20 by means of a flexible member including a cable 23 having its end connected with the eyed end at the upper end of pivot bolt 20. The Windlass is driven and controlled manually or from suitable power means controllable from within the cab of the truck or vehicle.

As shown, the mold board I5 is braced in its angular position relatively to the side of the vehicle by meansv of a pair of adjustable push poles or thrust beams 25 and 26. These push poles 25 and 26 preferably are constructed of adjustable telescoping sections and, as shown, the upper push pole 25 has the tubular section 25a telescoped on the rear rod section 251) and ad- 'heavy back bracing member 29 secured to the back of mold board I5. The outer end of the tubular section 25a of the upper push pole is also .pivotally connected with the reenforcing member 29 and the inner ends of the push poles are pivotally and substantially universally connected through joints 25d and 26d, respectively, with the movable member or piston 3!] of a hydraulic hoist supported from the adjacent side of the propellingvehicle. The piston 3!! slides along a pipe 3| of the hoist, raising with it the push poles 25 and 26.

The rear end of the mold board is supported and adjusted by means of a driven Windlass associated with and synchronized with the said hoist, and connected with a reenforcing rib I51 extending longitudinally at the rear and lower portion of the mold board by flexible means such as the cable 32 having connected to the end thereof the chain 33 which is adjustably secured to the mold board. The cable 32, as shown, passes over a pulley 34a mounted in the outer end of a swingable arm 34 which is supported from the mounting for the hoist and is braced by a diagonal brace rod 35 pivotally connected with the outer end thereof, and having its lower end mounted on a slide member 36 slidably mounted on the tube 3I of the hoist and limited in downward movement by a suitable abutment. The slide member 36 in the upward movement of piston 30 of the hoist is engaged thereby at a certain point and lifted, raising the arm 34 to the elevated position shown in Fig. 3 upon further upward movement of the piston. The winding of the Windlass, operation of the hoist, and raising of the arm 34 are so related as to properly correlate the operation of the push poles and the swinging elevation of the rear end of the mold board on its horizontal pivot I8 to enable the plow to be adjusted through a very wide range of positions, and when the plow is not in use, to enable th same to be disposed in the extreme upwardly swung position against the side of the vehicle, as shown in'dotted lines in Fig. 2. The back of the mold board, in addition to the longitudinally extending triangular formation I51 at its lower portion, is reenforced by an upper longitudinally extending rib I5s, by the transversely disposed heavy backing member 29 and cross ribs I5t, and the funnel portion at the outer end of the mold board is additionally reenforced by a longitudinal rib I5u rigidly connected with a casting I50 extending transversely of the mold board and furnishing also a bearing for the discharge rotor.

The discharge rotor, indicated as an entirety by the numeral I1, comprises a hub or rotary sleeve I'Ia mounted in suitable roller bearings upon an oscillatory sleeve 31, which sleeve extends at an acute angle through the reenforced central part of the funnel portion I5a of the mold board more or less longitudinally of the main portion of the mold board, and is journalled in a stationary sleeve 31a rigidly connected with the mold board. To the hub Fla is secured an outer sleeve member Ilb for the rotor, having attached thereto a plurality of variable pitch discharge blades He. The sleeve IIb has its outer end extending beyond oscillatory tube 31 and is connected by a sheer pin IId with a cupshaped driven member He, said cup-shaped member being non-rotatively connected with the driven axle or shaft of the rotor Hi. It will be noted that the arrangement of the blades I'Ic of the rotor is such that the blades flare outwardly, conforming to the general shape of the funnel portion I5a of the mold board and being so related thereto that material plowed is lifted by the backwardly sloping portion of the cutting edge of the mold board into the axial portion of the discharge rotor and discharged longitudinally and outwardly of the plow rather than upwardly. The rotor, as shown, includes not only the blades IIc, but a rigidly carried extension sleeve IIg disposed inwardly of the blades and journalled upon the stationary sleeve, and, having rigidly secured thereto a spiral screw or auger 38, which serves to assist in discharging material moved to the rear funnel portion of the mold board and to efiiciently feed material into the discharge rotor.

A skid shoe 39 for engaging the road or the upper strata of material above which the cut is made, is secured to the outer end of mold board I adjacent the lower edge thereof and extends rearwardly thereof. The shoe is rigidly attached, but may be adjustably secured to the heavy reenforcing rib I51.

From the foregoing description it will be apparent that the mold board is mounted for a variety of adjustments within wide limits. For cutting a high bank the forward end may be elevated by raising the slide 2! considerably above the position shown in Fig. 3, while the rear of the plow may be elevated and swung upwardly on the horizontal, forward pivot pin l8, and the piston 30 of the hoist elevated in synchronization with the winding of the elevating cable 32. On the other hand the forward end of the plow may be lowered to the ground line, as shown in Fig. 2, and the rear end lowered to a position several feet below the level of the road on which the truck travels, as, for example, into a ditch at the side of the road. Also the angulation of the mold board with respect to the side of the vehicle may be materially changed by adjustment of the push poles 25 and 26.

The discharge rotor is preferably driven from a source of power on the propelling vehicle such as a power take-off, and the driving element 4% of the power take-off, as illustrated, is disposed some distance rearwardly of the forward connection of the mold board, extending, as shown, transversely of the vehicle and at the rear of the cab. To drive the rotor efficiently in all the widely varied adjustable positions of the mold board, required semi-universal driving connections of a novel and improved construction. To this end we have provided driving connections cooperatively associated with driving connection focusing means to assure proper relationship of the driving shaft, drive connections, power takeoff, and rotor, through all said adjusted positions of the mold board. The power take-off shaft 4! (see Fig. 9) for driving rotor H, as illustrated, is suitably connected (not shown) with the vehicle engine or, if desired, with a separate motor or engine supported on the vehicle. Transmission mechanism is provided at the outer end of power take-off shaft 4!, including a stationary a cylindrical housing 42 rigidly secured, as shown, to the heavy covering sleeve 4la which surrounds shaft 4|, and having mounted therein in suitable bearings a stub shaft 43 which is connected for driving with power shaft 4| through the medium of bevel gears 43g and Mg, respectively, the gear 4lg being fixed to the outer extremity of power shaft 4|. Housing 42 has connected therewith for oscillation thereon, a transversely disposed transmission housing 44, as shown, of closed cylindrical shape. oscillatory housing 44 is secured to a fiat annular member 44a which acts as a turn table in conjunction with an annular flange 42a at the connected end of stationary housing 42. are connected to permit relative oscillation by a channeled connection ring 45. The stub shaft 4-3 of the transmission mechanism extends into the oscillatory housing 44, a suitable bearing being provided at the end of housing 42, and is The flanges 42a and 44a, as shown,

connected for driving a stub cross-shaft by engaging bevel gears 43a and 45a. Cross stub shaft 46 extends diametrically of the axis of turntable 44a, but axially of the main part of the housing 44, suitable bearings being provided at the opposite ends of the housing. Cross-shaft 46, beyond the end of housing 44, carries or has rigidly affixed thereto a driving connection element 4?, as shown, being the yoke element of a universal joint.

Transmission mechanism for the rotor I1 is mounted on the mold board 15, supported from the reenforcing casting I5?) with the assistance of the oscillatory sleeve 3'! in which the driving axle ll of the rotor is housed. The rotor transmission mechanism is mounted in a closed cylindrical housing 48 which is detachably and rigidly connected by bolts 481) with the outturned flange at the outer end of oscillatory sleeve 31, which houses the rotor driving axle Hf. Within transmission housing 48 and journalled in efiicient bearings at either end thereof is a relatively large bevel gear 5d,.the inner end of which is non-rotatably connected to the end of rotor driving axle 31. A detachable housing plate 48a renders accessible the interior of the oscillatory housing 43 as well as bevel gear 59 and its bearings. Oscillatory housing 48 has fixed thereto an extension or smaller auxiliary casing 5| of cylindrical shape disposed in the manner shown in Fig. 9, and having its interior in communication with the interior of housing 43. A stub shaft 52 journalled in suitable bearings adjacent its ends is mounted axially of the auxiliary casing 5| and has afiixed thereto a small bevel gear 52a meshed with the bevel gear 55. The stub shaft 52 extends through the outer end of casing 5| and carries or has affixed thereto a driving connection element 53, as shown in the form of the yoke element of a universal connection. Driving connection element 53 is connected with the driving connection element 41 of the transmission mechanism at the side of the vehicle by a longitudinally extensible drive shaft 54. In View of the very wide adjustability in the positioning of mold board 15, we employ several telescoping drive shaft sections, as shown, said sections being three in number, the outermost 54a being pivotally connected through a projecting tongue 54!? with the wrist member 53a of conventional form in the universal joint or driving connection element 53. Within drive shaft section 54a, the intermediate section 541) is telescoped and within section 541) the inner drive shaft rod section 540 is slidably disposed, the telescoped parts of said several sections being of rectangular cross section. The rod section 54c at the inner end of the drive shaft is pivotally connected with wrist member 41a of the universal joint element or drive connection element 41 projecting from the power take-off transmission mechanism.

The two oscillatory transmission housings 44 and 48 located at the side of the vehicle and on the mold board, respectively, are oscillated automatically by focusing mechanism during the various shifting movements or adjustment of the mold board 5 to at all times and in all adjusted positions, cause the universal joints or driving connection elements 53 and 41 to be properly related and positioned with reference to the connected ends of the drive shaft for efficient driving. In the embodiment of the invention illustrated, which is an actual full-sized working device, built and put into use, the angulation be.

of plowing operations. and at various angles relative to the road bed tween the drive shaft and said drive connection elements 53 and 41 never exceeds degrees, and

in most positions of the mold board the said elemounted for relative oscillation and they extend in side by side, but oftentimes non-parallel relation with the drive shaft 54. The end of the inner or tubular telescoping section 55a is eccentrically connected by a short torque sleeve 56 with the turntable 44a of the oscillatory transmission housing 44 at the side of the vehicle, saidconnection being permissive of oscillation of torque sleeve 56 in housing 44, rigid and, as shown, detachable. The end of the telescoping section 55b is eccentrically connected by a similar torque sleeve 57 with the oscillatory housing 48 mounted on the mold board.

Operation In operation, our plow, including its driving connections and related parts, is supported and propelled from a power driven vehicle, the mold board extending in the various plowing positions a considerable distance beyond the side of the vehicle and in many operations overhanging the shoulder and ditch at one side of a highway. In

some installations of our plow construction, par- .ticularly when mounted on the lighter types of propelling vehicles, it is desirable to ballast the truck or vehicle body on the opposite side from that supporting the mold board. The angulation of the mold board I5 in a rearward and outward direction relatively to the longitudinal center line of the vehicle, causes snow or other material plowed to first be moved with a rolling action upon the forward and medial portions of the mold board, which rolling action is accentuated by the upstanding forward portions of the cutting edge l5 and lower edge of the mold board. The variable pitch of cutting edge l6 and its twist from substantially said upstanding relation at its forward end to a slight angle With the horizontal at its rear portion, causes the material to slide and to be forced upwardly into the mold board funnel l5a and into the axial portion of rotor ll.

The plowed material upon engaging the rotor is first affected by the spiral screw 38. Screw 38 forces material outwardly along said funnel portion and has also a disintegrating effect upon such material while feeding it axially into the blades We of rotor I I.

The combined action of the rotor and funnel i511 results in the snow or other material being forcibly ejected outwardly and longitudinally of the mold board for a substantial distance.

Our improved construction with provision for great adjustability in the elevation and angulation of the mold board adapts it to a wide variety -Cuts at various heights may be made, the forward end of the mold board in the embodiment shown having an adjustment in elevation of approximately five feet, and the elevati n of the rear end of the plow be n adjustable through a range of nine or ten feet for mechanism,

operation. High drifts or snow walls formed by plowing the center of the road may be leveled by successive cuts with our improved structure, or when desired, the plow may be angled considerably with respect to the horizontal and the material back sloped for a very considerable dis.- tance from the edge of the highway. Forworking on a steep shoulder or a ditch below the level of the highway, the mold board may be dropped at its outer end several feet below the level of the road, and in such adjusted position the discharge rotor may extend to the ditch itself. When it is desired to move the vehicle from place to place on the highway without operating the plow, the mold board may be swung to the extreme upwardly tilted position shown in dotted lines in Figs. 1 and 2, where it will not obstruct the highway.

In all the various adjusted positions of our plow, the power discharge or rotor is efiiciently driven at high speed from the source of power taken from the medial portion of the propelling vehicle.

The moving of the mold board from one adjusted position to another operates the focusing including the extensible focusing arm 55 and the oscillatory transmission housings 48 and 44 which, by oscillation, shift the positions of the stub shafts 52 and 46 respectively, relatively to the rotor shaft and power shaft. Such focusing elements are related with the driving elements, including drive shaft 54 and drive connection elements 41 and 53 for effective driving relationship thereof in all positions of the mold board and to prevent any substantial angulation in the joints or connections of such driving parts.

In Figs 10 and 11 two more or less extreme adjusted positions of the mold board and variation of the focusing mechanism is shown, Fig. 10 showing the driving connections and focusing means when the plow is positioned in Figs. 1 and 2, and Fig. 11 showing such parts with the plow in the position of adjustment shown in Fig. 3.

By reference to Figs. 10 and 11 it will be seen that the oscillatory housings 44 and 48 have been turned considerably, as shown in Fig. 11, from their positions in Fig. 10, where the mold board is positioned horizontally, as shown in Fig. 1. The turnings of these housings, it will further be seen in Fig. 11, causes the universal connections to be shifted with respect to the power driving shaft and with respect to the axis of the rotor to substantially align the extensible driving shaft 54 with the driving connections in the adjusted position of the plow shown in Fig. 3. The extensible focusing arm 55 with its torque connections through sleeves 56 and 5'! with the oscillatory housings 44 and 48 respectively, positively position the housings in proper relationship through the extremely wide range of adjusted positions of our plow structure to always maintain effective driving relationship between the several parts of the driving connections.

From the foregoing description it will be seen that we have provided materially improved and highly efficient flexible or semi-universal driving connections for application to a source of power and a widely adjustable member or element carrying a driven device. With our construction the Various joints and elements of the driving connections will automatically be focused and maintained at most effective and substantially aligned positions regardless of the various adjustments of the member or element relative to the source of power.

It will, of course, be understood that various changes may be made in the form, details, arrangement and proportions of the parts without departing from the scope of our invention, which, generally stated, consists in a device capable of carrying out the, objects above set forth and in the novel parts. and combinations of parts disclosed and defined. in the appended claims.

What is claimed is:

1. The combination with a power supply shaft, a member mounted outwardly of said shaft for wide adjustment relative to the axis of said shaft, and a driven element mounted on said member, driving connections between said power shaft and said driven element comprising, a transmission mechanism connected with said power shaft and including a drive connection element shiftable in position relatively to said power shaft, and transmission mechanism connected with said driven element and mounted on said memher and including a drive connection element shiftable in position relatively to said driven element, a longitudinally extensible drive shaft having its ends connected respectively with said first and second drive connection elements each of said transmission mechanisms having a mounting for the parts thereof and a longitudinally extensible focusing member extending between the mountings of said two transmission mechanisms and connected with portions thereof to shift said drive connection elements to maintain the same in efficient relationship to the con ne-cted ends of said drive shaft during all adjusted positions of said member.

2. The combination with a power supply shaft, a member mounted outwardly of said shaft for wide adjustment relative to the axis of said shaft and a driven element mounted on said member, of, driving connections between said power shaft and said driven element comprising, transmission mechanism connected with said power shaft and including an oscillatory housing and a drive connection element mounted therein and drivably connected to said power supply shaft, transmission mechanism mounted on said member and including an oscillatory housing and a drive connection element mounted therein and drivably connected with said driven element, a, longitudinally extensible drive shaft having its ends connected respectively with said first and second drive connection elements by universal connections and a longitudinally extensible focusing member extending between aid two transmis sion mechanisms and connected with the respective housings thereof for torque effect to maintain said drive connection elements in effective relationship to said drive shaft during all adjusted positions of said member.

3. The combination with a power supply shaft, a member mounted outwardly of said shaft for wide adjustment relative to the axis of said shaft, and a driven element mounted on said member, of driving connections between said power shaft and said driven element comprising, a universal connection drivably connected to said power shaft and mounted for shifting of its axis relative to the axis of said power shaft, a second universal connection drivably connected to said driven element and mounted for shifting of the axis of its outer element relative to the axis of said driven element, a longitudinally extensible drive shaft having its ends connected respectively with said first and second universal connections, a shiftable mounting for each of said universal connections and, focusing means extending between and connected with said mountings and associated therewith to cause shifting of the axes of said universal connections for maintaining said universal connections and extensible drive shaft in eflicient relationship during all adjusted positions of said member.

4. The combination with a rotary power source element, a member mounted outwardly of said element for wide adjustment relative thereto and a driven element mounted on said member, of driving connections between said rotary element and said driven element including, a drive connection element connected with said power element, a mounting associated with said drive con nection element, a shiftable mounting carried by said outwardly disposed member, a drive connection element connected with said driven element and journaled in said last mentioned mounting and shiftable therewith relative to said driven element, a drive shaft having universal connections at its ends with said first mentioned and said second mentioned drive connection elements respectively, and a focusing member extending between said two mountings and connected therewith to shift the position of said second mounting and with it, the position of said second drive connection element relative to said driven element during adjustment of said outwardly disposed member, whereby said drive connection element will be maintained in efficient relationship to the connected ends of said drive shaft during all adjusted positions of said outwardly disposed member.

5. The combination with a rotary power source element, a member mounted outwardy of said element for wide adjustment relative thereto and a driven element mounted on said member, of driving connections between said rotary element and said driven element including, a shiftable mounting disposed adjacent said rotary power element, a drive connection element journaled in said mounting and shiftable therewith, relative to aid power element, a shiftable mounting carried by said outwardly disposed member, a drive connection element journaled in said last mentioned mounting and shiftable therewith relative to said driven element, a longitudinally extensible drive shaft having universal connections at its ends, with said first mentioned and said second mentioned drive connection elements respectively, and a longitudinally extensible focusing member extending between said two mountings and connected therewith to shift the relative positions of said mountings and consequently said drive connection elements journaled therein, during adjustment of said outwardly disposed member, whereby said drive connection elements will be maintained in efficient relationship to the connected ends of said drive shaft during all adjusted positions of said outwardly disposed member.

6. The combination with a rotary power source element, a member mounted outwardly of said element for wide adjustment relative thereto and a driven element mounted on said member, of driving connections between said rotary element and said driven element including, an oscillatory mounting disposed adjacent said rotary power element, a drive connection element journaled in said mounting and shiftable therewith, relative to said power element, a second oscillatory mounting carried by said outwardly disposed member, a drive connection element journaled in said second mounting and shiftable therewith relative to said driven element, an extensible drive shaft having universal connections at its respective ends with said first and second drive connection elements, and a focusing arm extending between said two mountings, and having torque connection therewith to shift the relative positions of said mountings, and consequently the respective drive connection elements journaled therein during adjustment of said outwardly disposed member,

7. The combination with a rotary power source element, a member mounted outwardly of said element for wide adjustment relative thereto and a drivenelement mounted on said member, of driving connections between said rotary element and said driven element including, an oscillatory mounting disposed adjacent said rotary power element, a drive connection element journaled in said mounting and shiftable therewith, relative to said power element, transmission mechanism mounted on said outwardly disposed member including a gear connected with said driven element and including a gear having planetary relationship with said first mentioned gear, an oscillatory transmission housing mounted axially of said first mentioned gear, a drive connection element journaled in said housing and having mounted thereon said second mentioned gear, and a longitudinally extensible focusing arm extending between said mountng and said transmission housing and having torque connection with said housing to shift the relative positions of said mounting and said transmission housing, and consequently the respective drive connection elements journaled therein during adjustment of said outwardly disposed member.

8. The combination with a rotary power source element, a member mounted outwardly of said element for wide adjustment relative thereto and a driven element mounted on said member, of driving connections between said rotary element and said driven element including, a transmission mechanism connected with said rotary power element and having an oscillatory housing, said transmission mechanism including a drive connection element journaled in said housing and shiftable therewith relative to said power element, a second transmission mechanism mounted on said outwardly disposed member and having an oscillatory housing and a drive connection element journaled therein and shiftable therewtih relative to said driven element, a longitudinally extensible drive shaft having universal connections at its ends with said first mentioned and said second mentioned drive connection elements respectively, and a focusing arm extending between said two housings and having torque connection at its respective ends therewith to shift the relative positions of said mountings, and consequently the respective drive connection elements journaled therein during adjustment of said outwardly disposed member.

9. The structure set forth in claim 8, wherein said drive connection elements of said two transmission mechanisms have planetary relationship with other transmission elements disposed axially of said respective transmission housings.

EDWARD RUSSELL GREER. MATI-IER GARLAND. 

